PDR Health

Parafon Forte DSC

Generic name: Chlorzoxazone

What is Parafon Forte DSC?

Parafon Forte DSC (chlorzoxazone) is a muscle relaxant. It works by blocking nerve impulses (or pain sensations) that are sent to your brain.

Parafon Forte DSC is used together with rest and physical therapy to treat skeletal muscle conditions such as pain or injury.

Parafon Forte DSC may also be used for purposes not listed in this medication guide.

Parafon Forte DSC

Health Benefits

Parafon Forte DSC can be used to relieve muscle spasms and pain. It is typically prescribed as part of a treatment plan that includes rest and physical therapy.

Side Effects

Common side effects of Parafon Forte DSC include:





upset stomach,

constipation, or;

blurred vision.

Serious side effects are rare but can occur. Seek immediate medical attention if you experience any of the following symptoms:

signs of an allergic reaction (hives, rash, itching, difficulty breathing, swelling in the face or throat),

unusual bleeding or bruising,

yellowing of the skin or eyes,

dark urine or clay-colored stools,

fever, chills or sore throat.


The usual starting dose of Parafon Forte DSC is 250 mg to 750 mg (1 or 3 tablets) taken 3 times a day. Your doctor may increase your dose as needed.

Parafon Forte DSC should not be taken for more than 2 weeks unless directed by your doctor.


Parafon Forte DSC may interact with other medications you are taking. This can increase your risk of side effects or cause your medications to not work as well. To avoid interactions, your doctor should manage all of your medications carefully. Be sure to tell your doctor about all the medicines you take, including prescription and over-the-counter drugs, vitamins, and herbal supplements. Do not start or stop taking any medicine without talking to your doctor first.

Mechanism of Action

The exact mechanism of action for Parafon Forte DSC is unknown. It is thought to work by blocking nerve impulses (or pain sensations) that are sent to your brain.


Parafon Forte DSC is rapidly absorbed from the gastrointestinal tract. The peak plasma concentration is reached within 1 to 2 hours. Parafon Forte DSC is widely distributed in the body and is bound to plasma proteins. It is metabolized in the liver and excreted in the urine. The half-life of Parafon Forte DSC is 3 to 4 hours.

Pregnancy and Parafon Forte DSC

Parafon Forte DSC should not be used during pregnancy unless the potential benefit justifies the potential risk to the fetus.

This medication may pass into breast milk and could have harmful effects on a nursing baby. Therefore, breastfeeding is not recommended while taking Parafon Forte DSC.

Alternatives to Parafon Forte DSC

There are many alternative muscle relaxants available. Some common examples include:





Methocarbamol, or;


Your doctor can help you choose the best medication for your specific condition.

How long does it take to work?

Parafon Forte DSC begins to work within 1 to 2 hours. However, it may take several days or weeks before you feel the full effects of the medication.

Long-term effects

Parafon Forte DSC is not intended for long-term use. It should only be used for 2 weeks unless directed by your doctor. Using Parafon Forte DSC for longer than 2 weeks can increase the risk of side effects and dependence on the medication.

If you have any questions about Parafon Forte DSC, please talk with your doctor, pharmacist, or other health care provider.


Parafon Forte DSC is a white, crystalline powder with a molecular weight of 333.8 and the following structural formula:



Store at 20°-25°C (68°-77°F) in a dry place. Protect from light. Keep out of reach of children.

Dispense in a tight container as defined in the USP/NF.